Chemistry questions
29404 published questions with worked solutions.
- At 25°C, the solubility product of Mg(OH)_2 is 1.0 10^ -11 . At which pH, will Mg^ 2+ ions start precipitating in the form of...
- The correct order of increasing basicity of the given conjugate bases (R = CH_3) is
- Out of the following, the alkene that exhibits optical isomerism is
- The edge length of a face centered cubic cell of an ionic substance is 508pm. If the radius of the cation is 110pm, the radius of...Not in JEE Main or NEET syllabus
- Percentage of free space in cubic close packed structure and in body centred packed structure are respectivelyNot in JEE Main or NEET syllabus
- If 10^ -4 dm^3 of water is introduced into a 1.0dm^3 flask to 300 K, how many moles of water are in the vapour phase when...
- If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing...
- On mixing, heptane and octane form an ideal solution. At 373 K, the vapour pressures of the two liquid components (heptane and...
- The Gibbs energy for the decomposition of Al_2O_3 at 500°C is as follows : 23Al_2O_3 43Al + O_2, _rG = +966 kJ mol^ -1 The...
- The correct order of E^0_ M^ 2+ /M values with negative sign for the four successive elements Cr, Mn, Fe and Co is
- The time for half life period of a certain reaction A → products is 1 hour. When the initial concentration of the reactant ' A ',...
- Consider the reaction : Cl_2(aq) + H_2S(aq) S(s) + 2H^+(aq) + 2Cl^-(aq) The rate equation for this reaction is rate =...
- Three reactions involving H_2PO_4^- are given below : (i) H_3PO_4 + H_2O H_3O^+ + H_2PO_4^- (ii) H_2PO_4^- + H_2O HPO_4^ 2- +...
- Which one of the following has an optical isomer ? (en = ethylenediamine)
- From amongst the following alcohols the one that would react fastest with conc. HCl and anhydrous ZnCl_2, is
- One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44u. The alkene is
- The polymer containing strong intermolecular forces e.g. hydrogen bonding, is
- Biuret test is not given by
- A 5.2 molal aqueous solution of methyl alcohol, CH_3OH, is supplied. What is the mole fraction of methyl alcohol in the solution?
- The magnetic moment (spin only) of [NiCl_4]^ 2- is